package com.sky.service.impl;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    private static final String WX_LOGIN = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper ;

    /**
     * 用户微信登入
     * @param userLoginDTO
     * @return
     */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口服务
        String openid = getOpenid(userLoginDTO.getCode());

        //判断openid是否为空，为空则登录失败

        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //查询用户是否为新用户

        User user = userMapper.getByOpenid (openid) ;

        //如果是新用户则创建用户
        if (user == null) {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build() ;

            userMapper.insert(user) ;
        }

        //返回用户对象


        return user ;
    }


    private String getOpenid(String code) {
        Map<String,String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid()) ;
        map.put("secret",weChatProperties.getSecret()) ;
        map.put("js_code",code) ;
        map.put("grant_type","authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN, map);

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");

        return openid;
    }
}
